Red Hat Training

10.2. Cluster Does Not Form

If you find you are having trouble getting a new cluster to form, check for the following things:

Make sure you have name resolution set up correctly. The cluster node name in the cluster.conf file should correspond to the name used to resolve that cluster's address over the network that cluster will be using to communicate. For example, if your cluster's node names are nodea and nodeb make sure both nodes have entries in the /etc/cluster/cluster.conf file and /etc/hosts file that match those names.

If the cluster uses multicast for communication between nodes, make sure that multicast traffic is not being blocked, delayed, or otherwise interfered with on the network that the cluster is using to communicate. Note that some Cisco switches have features that may cause delays in multicast traffic.

Where did the comment section go?

Red Hat's documentation publication system recently went through an upgrade to enable speedier, more mobile-friendly content. We decided to re-evaluate our commenting platform to ensure that it meets your expectations and serves as an optimal feedback mechanism. During this redesign, we invite your input on providing feedback on Red Hat documentation via the discussion platform.